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🛏️ Elevate your sleep game with smart support and zero hassle!
The Zinus WonderBox™ Smart Box Spring King in Grey combines durable alloy steel construction with a tool-free, snap-together design for quick assembly. Delivered in eco-friendly compact packaging, it offers customizable height options (5” or 9”) to optimize mattress support and comfort. Supporting up to 700 lbs and backed by a 5-year warranty, it’s engineered for long-lasting stability and a cleaner planet.








| ASIN | B0D2VNJHS7 |
| Assembly Instructions Description | Included |
| Brand Name | Zinus |
| Color | Grey |
| Compatible With Mattress Size | King |
| Customer Reviews | 4.0 4.0 out of 5 stars (262) |
| Finish Types | Unfinished |
| Form Factor | Rectangular bed frame |
| Furniture Finish | Gray |
| Global Trade Identification Number | 00841550372724 |
| Included Components | Box Spring, Instruction Sheet |
| Item Dimensions | 199.9 x 191.8 x 22.9 centimeters |
| Item Dimensions L x W x H | 199.9L x 191.8W x 22.9H centimeters |
| Item Type Name | Box Spring |
| Item Weight | 16.68 Kilograms |
| Manufacturer | Zinus |
| Manufacturer Part Number | ZU-FBSSG1OC-09K |
| Material Type | Alloy Steel |
| Maximum Weight Recommendation | 700 Pounds |
| Model Number | ZU-FBSSG1OC-09K |
| Other Special Features of the Product | Squeak Resistant |
| Required Assembly | Yes |
| Set Name | WonderBox(TM) |
| Shape | Rectangular |
| Size | King |
| Style Name | 9 inch |
| UPC | 841550372724 |
| Unit Count | 1.0 Count |
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